If any of you with bigger tires are even thinking about changing ring and pinion... [Archive]

OrangeCrush

11-16-2005, 10:39 PM

DO IT.

Before I put my lift on my H2, my gas mileage was roughly 11-12 mpg. That was driving mostly city, minor highway.

When I put the lift with the 38's on it, my mileage immediately went from the 11-12 mpg to 8.6-9.1 mpg.

My logic was to install 4.56's which would bring the truck as close as possible to the stock configuration.

Point is, though I only installed them this weekend, I am averaging 11.0-11.5 mpg with way more power.

Excluding the labor because I did it, I've got less than 700 bucks in it. At a 2-3mpg increase, it won't take long to cover the cost of the gears.

Anyway, DEFINITE improvement, well worth the effort and money.

Mark

OrangeCrush

11-16-2005, 10:39 PM

DO IT.

Before I put my lift on my H2, my gas mileage was roughly 11-12 mpg. That was driving mostly city, minor highway.

When I put the lift with the 38's on it, my mileage immediately went from the 11-12 mpg to 8.6-9.1 mpg.

My logic was to install 4.56's which would bring the truck as close as possible to the stock configuration.

Point is, though I only installed them this weekend, I am averaging 11.0-11.5 mpg with way more power.

Excluding the labor because I did it, I've got less than 700 bucks in it. At a 2-3mpg increase, it won't take long to cover the cost of the gears.

Anyway, DEFINITE improvement, well worth the effort and money.

Mark

MUH_HUM

11-16-2005, 10:51 PM

I'm running 37's (no lift) and noticed no difference in mpg....Still @ like 12.

1BADH2

11-17-2005, 02:39 PM

OC, what make did you install? I want to do that this spring my H2 doesn't like to move my 41's http://www.elcova.com/infopop/emoticons/icon_biggrin.gif

kdio

11-17-2005, 04:22 PM

I waited a long time before I finally changed the gears. Huge difference, wished I did it sooner. I also went with 4.56 gears.

ROX

11-17-2005, 07:26 PM

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by MUH_HUM:
I'm running 37's (no lift) and noticed no difference in mpg....Still @ like 12. </div></BLOCKQUOTE>
Did you change your gears? (I'm assuming you did) Do you ever tow anything? Is there a difference in power?

rvs9

11-17-2005, 07:28 PM

OC,

Where did you get your gears?

OrangeCrush

11-17-2005, 07:44 PM

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by H2 Rocks:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by MUH_HUM:
I'm running 37's (no lift) and noticed no difference in mpg....Still @ like 12. </div></BLOCKQUOTE>
Did you change your gears? (I'm assuming you did) Do you ever tow anything? Is there a difference in power? </div></BLOCKQUOTE>

I'm astounded that he didn't notice any difference in power. Granted, they are a little smaller than the 38's but still, it wasn't even close. God forbid I try to tow anything.

OrangeCrush

11-17-2005, 07:58 PM

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by rvs9:
OC,

Where did you get your gears? </div></BLOCKQUOTE>

Got the gears from this place. http://www.accuautoparts.com/index.jsp

Was just under 700 for gears, pinion bearings and minor install kit. (MAKE SURE YOU GET RACES WITH THE PINION BEARINGS. read my post today http://elcova.com/groupee/forums?a=tpc&s=2826088551&f=6...271025641#9271025641 (http://elcova.com/groupee/forums?a=tpc&s=2826088551&f=6706011751&m=927102564 1&r=9271025641#9271025641) )